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merge vs set a value
(version: 0)
Comparing performance of:
merge vs set a value
Created:
6 years ago
by:
Guest
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Tests:
merge
let obj1 = { first: 'first', second: 'second', third: 'third' }; const obj2 = { fourth: 'fourth' }; obj1 = { ...obj1, ...obj2, };
set a value
let obj1 = { first: 'first', second: 'second', third: 'third' }; obj1.fourth = 'fourth';
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Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
merge
set a value
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and explain what's being tested. **Benchmark Overview** The benchmark is designed to compare two approaches: merging objects using the spread operator (`...`) versus setting a value on an existing object. **Options Compared** Two options are compared: 1. **Merge**: Using the spread operator to merge two objects, `obj1` and `obj2`. This approach creates a new object with all properties from both objects. 2. **Set a value**: Setting a single property (`fourth`) on an existing object (`obj1`). This approach modifies the original object by assigning a new value to the specified property. **Pros and Cons of Each Approach** **Merge:** Pros: * Can be more efficient for large objects with many properties, as it avoids creating a temporary object. * Can be more readable for complex merge scenarios. Cons: * Creates a new object, which may incur additional memory allocation overhead. * May not be as intuitive for simple assignment cases. **Set a Value:** Pros: * Modifies the original object, avoiding unnecessary memory allocations. * Suitable for simple assignment cases. Cons: * Can lead to unexpected behavior if the property is already present in the original object and has a different data type. * May not be as efficient for large objects with many properties. **Library and Special JS Features** There doesn't seem to be any specific library being used in this benchmark. However, it's worth noting that `let` declarations are commonly used in modern JavaScript code, and the syntax is generally considered idiomatic. **Other Considerations** * **Object Literal Syntax**: The benchmark uses a simple object literal syntax, which is widely supported by modern browsers. * **Browser Support**: The benchmark appears to be optimized for desktop browsers (Chrome 86 on Linux) but may not work as expected in other environments. **Alternatives** If you're looking for alternative approaches or variations on this benchmark, consider the following: * Compare the performance of different merge strategies, such as using `Object.assign()` instead of the spread operator. * Test the impact of using `const` vs. `let` declarations on object assignments. * Examine the performance of other property assignment methods, like using `this[propertyName] = value;`. Keep in mind that these variations may require additional setup and configuration for the benchmark to work correctly. I hope this explanation helps you understand what's being tested in MeasureThat.net!
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